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May i know how to find the cross product of 2 different vectors without the use of programming libraries?
E.g given vector a = (1, 2, 3) vector b = (4, 5, 6)
Started by blur959 on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
About the formula for the cross product? Or how to do indexing and lists in python?
The basic idea, the cross product is the antisymmetric product of the elements, which also has a nice geometrical]*b[1] - a[1]*b[0]....
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*Messing around with 'extension functions' for the List module. (I spent quite a while developing 'mapfold' - which threads an accumulator like fold, but uses it as a parameter to create new values like map - then discovered that that is what List.scan...
Started by Benjol on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Do....
Hi, another option is to use F# "sequence expressions" and write something like this:
let crossproduct l1 l2 = seq { for el1 in l1 do for el2 in l2 do yield el1, el2 };;
(actually, it is almost the same thing as what you wrote, because 'for . .
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From wikipedia:
the cross product is a binary operation on two vectors in a three-dimensional Euclidean space that results in another vector which is perpendicular to the plane containing the two input vectors.
Given that the definition requires at least...
Started by Zack Mulgrew on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Implementation euclidean space....
The 3D cross product will be perpendicular to that plane, and thus have 0 X & Y components (thus the scalar returned is the Z value of the 3D cross product vector).
As a plane in the 3D space).
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Can anyone provide an example of a function that returns the cross product of TWO 2d vectors? I am trying to implement this algorithm .
C code would be great. Thanks.
EDIT: found another way todo it that works for 2D and is dead easy.
bool tri2d::inTriangle...
Started by tm1rbrt on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Note: The cross-product of 2 vectors is only defined in 3D and 7D spaces .)
The code computes; return z;
Mathworld Cross Product.
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I have two tables that I would like to join but I am getting an error from MySQL
Table: books bookTagNum ShelfTagNum book1 1 book2 2 book3 2 Table: shelf shelfNum shelfTagNum 1 shelf1 2 shelf2
I want my results to be:
bookTagNum ShelfTagNum shelfNum book...
Started by Steve on
, 6 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
ShelfNum = books a join instead of a cross product, you should state it explicitly in the SQL, thus:
SELECT are indeed getting the cross....
Your where clause cannot possibly be books.
Check your SQL.
Was a cross product.
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Http://www.media.chrysler.com/newsre...&id=11949&mid=
New 2012 Jeep® Grand Cherokee SRT8® SUVs Will Sport Ferrari Red for Formula One Stars Fernando Alonso and Felipe Massa
Custom-built versions of the high-performance Jeep® Grand Cherokee SRT8® feature...
Started by DennisForza on
, 11 posts
by 8 people.
Answer Snippets (Read the full thread at ferrarichat):
Were promoting a Ferrari themed product, but one car company making a tribute car to another company to improve.
This kind of brand cross promotion is tacky, It would be one thing if Pepsi, Acer, Apple, etc.
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I have a database that stores products "available on the market" and products "still in development" in two separate tables ( market_product and dev_product ). A third table (substance) contains all substances a product can made of. Other two tables (...
Started by Hobbes on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
SELECT d1.devId, m1.prodId FROM market_product_comp m1 CROSS JOIN dev_product_comp d1select d.* from dev_product d left join dev_product_comp dpc on d.Id = dpc.devId where dpc.substID in (select mpc....
Ignores NULLs.
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I am trying to get an intuition behind the cross product but i seem to get stuck with understanding why we make the vector perpendicular to the other two? I understand the need to define an orientation for physical systems like torque (ccw or cw) but ...
Started by Storm Butler on
, 4 posts
by 3 people.
Answer Snippets (Read the full thread at physicsforums):
Turning still have directional....
The cross product comes from vector geometry, for instance, the direction perpendicular to a plane is not a turning vector like torque but is still determined by the cross-product of two vectors things.
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I bought a Cross Century II Platinum Art Deco fountain pen from ebay the other day. I'm just curious how to tell if a cross pen is a manufactured 2nd. The pen I got looks great but for future purposes I would like to know what to look for.
Started by jprochnow on
, 6 posts
by 5 people.
Answer Snippets (Read the full thread at fountainpennetwork):
The pen I got looks great but for future purposes pens
Have a nice day
Junaid jprochnow... .
I'm just curious how to tell if a cross pen is a manufactured 2nd.
I bought a Cross Century II Platinum Art Deco fountain pen from ebay the other day.
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A cross join performs a cartesian product on the tuples of the two sets.
SELECT * FROM Table1 CROSS JOIN Table2
Which circumstances render such an SQL operation particularly useful?
Started by vanslly on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
The whole article of clothing:
select size....
You do a cross join on the product key (to match up the potential buyersYou're typically not going to want a full Cartesian product for most database queries.
For products at a cost.
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